<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>组件</title>
</head>
<script src="http://code.jquery.com/jquery-2.1.1.min.js"></script>
<!-- 最新版本的 Bootstrap 核心 CSS 文件 -->
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/3.4.1/css/bootstrap.min.css"
    integrity="sha384-HSMxcRTRxnN+Bdg0JdbxYKrThecOKuH5zCYotlSAcp1+c8xmyTe9GYg1l9a69psu" crossorigin="anonymous">

<!-- 可选的 Bootstrap 主题文件（一般不用引入） -->
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/3.4.1/css/bootstrap-theme.min.css"
    integrity="sha384-6pzBo3FDv/PJ8r2KRkGHifhEocL+1X2rVCTTkUfGk7/0pbek5mMa1upzvWbrUbOZ" crossorigin="anonymous">

<!-- 最新的 Bootstrap 核心 JavaScript 文件 -->
<script src="https://stackpath.bootstrapcdn.com/bootstrap/3.4.1/js/bootstrap.min.js"
    integrity="sha384-aJ21OjlMXNL5UyIl/XNwTMqvzeRMZH2w8c5cRVpzpU8Y5bApTppSuUkhZXN0VxHd"
    crossorigin="anonymous"></script>

<body>
    <ol class="breadcrumb">
        <li><a href="#">Home</a></li>
        <li><a href="#">Library</a></li>
        <li class="active">Data</li>
    </ol>
    <div class="progress">
        <div class="progress-bar" role="progressbar" aria-valuenow="20" aria-valuemin="0" aria-valuemax="100"
            style="width: 20%;">
            <span class="sr-only">60% Complete</span>
        </div>
    </div>
    <!-- 缩略图 -->
    <div class="row">
        <div class="col-xs-6 col-md-3">
            <div class="thumbnail">
                <img src="https://artwork.starbucks.com.cn/banners-homepage-banner/main_9b62183b-633a-4dc1-a4a6-627a22cca859.png" alt="...">
            </div>
        </div>
        <div class="col-xs-6 col-md-3">
            <a href="#" class="thumbnail">
                <img src="https://artwork.starbucks.com.cn/banners-homepage-banner/main_9b62183b-633a-4dc1-a4a6-627a22cca859.png" alt="...">
            </a>
        </div>
        <div class="col-xs-6 col-md-3">
            <a href="#" class="thumbnail">
                <img src="https://artwork.starbucks.com.cn/banners-homepage-banner/main_9b62183b-633a-4dc1-a4a6-627a22cca859.png" alt="...">
            </a>
        </div>
        <div class="col-xs-6 col-md-3">
            <a href="#" class="thumbnail">
                <img src="https://artwork.starbucks.com.cn/banners-homepage-banner/main_9b62183b-633a-4dc1-a4a6-627a22cca859.png" alt="...">
            </a>
        </div>
    </div>
</body>

<style>
    .myselfclass {
        background-color: antiquewhite;
    }
</style>

</html>